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TDA2P-ACD: tps65917-q1 LDO4_OUT ( 1.2V ) Control

Part Number: TDA2P-ACD
Other Parts Discussed in Thread: TPS65917-Q1

Let me ask you question about TDA2P PMIC (tps65917-q1)
I would like to use LDO4_OUT (1.2V Regulator )
When I review the SBL Part‘s regulator source code, I think that it will control voltage through I2C1  connected TDA2P .
Please refer to the below the schemetic LDO4_OUT Part .
I already measure this point , I can get the 5V output .
But, even though I try to change some SBL source code , it was still 5V Output.
I don’t know where to modify SBL Source code .
Please let me know , if you have a some experience this issue.

Thank you